[mythtv-users] Kernel Panic - SCSI & IDE

[Bruce Nordstrand]

Excellent! Thanks John

Definately not hand holding, alot of very useful info in here and I am
now off to try things out....

Cheers
Bruce

John Johnson wrote:
> Bruce,
>
> This may be a little too much hand holding for you, but others who  
> search the archives might find it helpful.
>
> The commands below work on my Fedora Core 3 machine, it is a Dell  
> PowerEdge 1650 with dual 1266MHz PIIIs, 1GB RAM, two SCSI 36GB drives  
> using the on-board RAID, appearing as /dev/sda to Linux, and  
> partitioned as /dev/sda1 /boot, /dev/sda2 /, /dev/sda3 swap, /dev/ 
> sda6 /home. I also have four 160GB USB2.0 drives connected to a  
> USB2.0 card I added in the 64 bit slot. The drives are set up as a  
> 640GB Logical Volume striped across the drives. There is a PVR-250 in  
> the computer's 32 bit slot.
>
> If I were you I would:
>
> Remove the IDE drive for the moment.
>
> Install an O/S and get everything working.
> As root, run these commands:
> mkdir -m 600 -p /var/spool/check_points
> touch /var/spool/check_points/after_os_install
>
> You should have room to do a quick backup of everything.
> Make a place for the backups, unmount the boot partition, and dump a  
> compressed image of it to a backup file.
>
> mkdir -p /var/backups
> umount /boot
> dd if=/dev/sda1 | gzip -c >/var/backups/boot.image.gz
>
> Backup the root partition.
> tar cvjf /var/backups/root_after_os_install.tar.gz --exclude '/var/ 
> backups/*' /
>
> Install KnoppMyth (or something else) and let the setup do it's  
> thing. You can use set it up to use /video and /music for storage.  
> Just make them folders off the root for the time being.
> When everything is playing nicely together, shutdown the machine  
> completely, and power off (that's important).
> Boot it up again.
> Make sure everything still works as it should. Try recording a show,  
> watching TV, etc.
> Shut the machine down completely, and turn it off (again).
> Boot it up.
> Everything still working?
> As root, run this command:
> touch /var/spool/check_points/after_myth_install
>
> Now, back up just the changes since our last backup:
> find . -newer /var/spool/check_points/after_os_install \
> 	-a ! -type d | tar cvjf backups/after_myth_install.tar.bz2 \
> 	-T - --exclude 'backups/*'
>
> Shut it down and connect the IDE drive.
> Boot it up.
> Everything still working?
>
> Now, you can begin creating your LVM set on the IDE drive.
>
> # warning, the following commands will destroy whatever is on the  
> drive hda.
> pvcreate /dev/hda
> vgcreate myth_group /dev/hda
> lvcreate -L 18000M myth_group
> lvcreate -L 18000M myth_group
> mkfs.xfs /dev/myth_group/lvol0
> mkfs.xfs /dev/myth_group/lvol1
>
> Be sure the backend is shut down:
> /etc/init.d/mythbackend stop
>
> Mount the partitions and copy files over.
> mkdir /mnt/lvol0
> mkdir /mnt/lvol1
> mount /dev/myth_group/lvol0 /mnt/lvol0
> mount /dev/myth_group/lvol1 /mnt/lvol1
> cp -a /video/* /mnt/lvol0
> cp -a /music/* /mnt/lvol1
>
> Unmount the partitions.
> umount /mnt/lvol0
> umount /mnt/lvol1
>
> Add lines to your fstab so they will be mounted automatically when  
> you boot.
> /dev/myth_group/lvol0      /video                  xfs      
> defaults,suid   0 0
> /dev/myth_group/lvol1      /music                  xfs      
> defaults,suid   0 0
>
> Try to mount them:
> mount /video
> mount /music
>
> Change the owner and group so Myth can use them:
> chown mythtv:mythtv /video /music
> chmod u=rwx,g=rwx /video /music
>
> And see how much space is available:
> df -h /video /music
>
> If you see them listed, you're in business. Start the backend and see  
> how it likes them:
> /etc/init.d/mythbackend start
> tail -f /var/log/mythtv/mythbackend.log
>
> You should see normal messages about the backend starting, scheduling  
> shows, etc.
>
> Now see if things in the frontend work, recording programs, watching  
> live TV, etc.
>
> Once again, mark your place:
> touch /var/spool/check_points/after_lvm_setup
>
> And, another backup:
> find . -newer /var/spool/check_points/after_myth_install \
> 	-a ! -type d | tar cvjf backups/after_lvm_setup.tar.bz2 \
> 	-T - --exclude 'backups/*'
>
> Now you can shutdown all the way to power off again, boot the  
> machine, and see if everything works, the LVM partitions are mounted,  
> etc.
>
> All the turning off is to be sure the hardware (like the tuner card)  
> are truly reset before the system comes up. That way, you will know  
> that if the power goes off, and back on, the system will come back up  
> and work correctly. The shutdowns are also so that UDEV will process  
> it's rules, permissions, and configuration (all in /etc/udev) and set  
> the hardware up correctly. I've had several problems with UDEV  
> wanting the /dev/video* to be owned by root with 660 permissions,  
> meaning Myth couldn't access them. I've also had problems with the  
> USB drives changing devices at random (i.e. /dev/sdb becomes /dev/ 
> sdd, etc.) but that's another protracted email :-).
>
> Regards,
>    JJ
>
> ---
> "America goes not abroad in search of monsters to destroy." -- John  
> Quincy Adams
>
> On 08-Jul-2006, at 13:09, Bruce Nordstrand wrote:
>
>